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                                <h1 id="my&#x7ED3;&#x6784;&#x5316;&#x67E5;&#x8BE2;&#x8BED;&#x53E5;&#x5206;&#x7C7B;">My&#x7ED3;&#x6784;&#x5316;&#x67E5;&#x8BE2;&#x8BED;&#x53E5;&#x5206;&#x7C7B;</h1>
<table>
<thead>
<tr>
<th style="text-align:left">&#x540D;&#x79F0;</th>
<th style="text-align:left">&#x89E3;&#x91CA;</th>
<th style="text-align:left">&#x547D;&#x4EE4;</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:left">DDl<br>(&#x6570;&#x636E;&#x5B9A;&#x4E49;&#x8BED;&#x8A00;)</td>
<td style="text-align:left">&#x5B9A;&#x4E49;&#x548C;&#x7BA1;&#x7406;&#x6570;&#x636E;&#x5BF9;&#x8C61;,&#x5982;&#x6570;&#x636E;&#x5E93;,&#x6570;&#x636E;&#x8868;&#x7B49;</td>
<td style="text-align:left">CREATE,DROP,ALTER</td>
</tr>
<tr>
<td style="text-align:left">DML<br>(&#x6570;&#x636E;&#x64CD;&#x4F5C;&#x8BED;&#x8A00;)</td>
<td style="text-align:left">&#x7528;&#x4E8E;&#x64CD;&#x4F5C;&#x6570;&#x636E;&#x5E93;&#x5BF9;&#x8C61;&#x4E2D;&#x5305;&#x542B;&#x7684;&#x6570;&#x636E;</td>
<td style="text-align:left">INSERT,UPDATE,DELETE</td>
</tr>
<tr>
<td style="text-align:left">DQL<br>(&#x6570;&#x636E;&#x67E5;&#x8BE2;&#x8BED;&#x8A00;)</td>
<td style="text-align:left">&#x7528;&#x4E8E;&#x67E5;&#x8BE2;&#x6570;&#x636E;&#x5E93;&#x6570;&#x636E;</td>
<td style="text-align:left">SELECT</td>
</tr>
<tr>
<td style="text-align:left">DCL<br>(&#x6570;&#x636E;&#x63A7;&#x5236;&#x8BED;&#x8A00;)</td>
<td style="text-align:left">&#x7528;&#x6765;&#x7BA1;&#x7406;&#x6570;&#x636E;&#x5E93;&#x8BED;&#x8A00;,&#x5305;&#x62EC;&#x6570;&#x636E;&#x5E93;&#x6743;&#x9650;&#x53CA;&#x6570;&#x636E;&#x66F4;&#x6539;</td>
<td style="text-align:left">GRANT,COMMIT,ROLLBACK</td>
</tr>
</tbody>
</table>
<pre><code class="lang-mysql">&#x521B;&#x5EFA;&#x6570;&#x636E;&#x5E93;
create  database [if not exists] &#x6570;&#x636E;&#x5E93;&#x540D;;


&#x5220;&#x9664;&#x6570;&#x636E;&#x5E93;
drop database [if exists] &#x6570;&#x636E;&#x5E93;&#x540D;;

&#x67E5;&#x770B;&#x6570;&#x636E;&#x5E93;
show database;

&#x4F7F;&#x7528;&#x6570;&#x636E;&#x5E93;
use &#x6570;&#x636E;&#x5E93;&#x540D;;
</code></pre>
<p><strong>&#x8868;&#x7ED3;&#x6784;</strong></p>
<pre><code class="lang-mysql">&#x663E;&#x793A;&#x8868;&#x7ED3;&#x6784;
desc &#x8868;&#x540D;;

&#x663E;&#x793A;&#x521B;&#x5EFA;&#x8BED;&#x53E5;
show create table &#x8868;&#x540D;;
</code></pre>
<pre><code class="lang-mysql">&#x521B;&#x5EFA;&#x6570;&#x636E;&#x8868;
&#x53CD;&#x5F15;&#x53F7;(&#x53EF;&#x9009;,&#x533A;&#x522B;&#x4E8E;&#x5355;&#x5F15;&#x53F7;)
create table [if not exists] `&#x8868;&#x540D;` (
    `&#x5B57;&#x6BB5;&#x540D;1` &#x5217;&#x7C7B;&#x578B; [&#x5C5E;&#x6027;] [&#x7D22;&#x5F15;] [&#x6CE8;&#x91CA;],
    `&#x5B57;&#x6BB5;&#x540D;2` &#x5217;&#x7C7B;&#x578B; [&#x5C5E;&#x6027;] [&#x7D22;&#x5F15;] [&#x6CE8;&#x91CA;],
    `&#x5B57;&#x6BB5;&#x540D;3` &#x5217;&#x7C7B;&#x578B; [&#x5C5E;&#x6027;] [&#x7D22;&#x5F15;] [&#x6CE8;&#x91CA;],
    ... ...
    `&#x5B57;&#x6BB5;&#x540D;` &#x5217;&#x7C7B;&#x578B; [&#x5C5E;&#x6027;] [&#x7D22;&#x5F15;] [&#x6CE8;&#x91CA;]
) [&#x8868;&#x7C7B;&#x578B;] [&#x8868;&#x5B57;&#x7B26;&#x96C6;] [&#x6CE8;&#x91CA;];

&#x53CD;&#x5F15;&#x53F7;&#x7528;&#x4E8E;&#x533A;&#x522B; MySql &#x4FDD;&#x7559;&#x5B57;&#x4E0E;&#x666E;&#x901A;&#x5B57;&#x7B26;&#x800C;&#x5F15;&#x5165;&#x7684;
</code></pre>
<p><strong>&#x5217;&#x7C7B;&#x578B;</strong></p>
<ul>
<li>&#x89C4;&#x5B9A;&#x6570;&#x636E;&#x5E93;&#x4E2D;&#x8BE5;&#x5217;&#x5B58;&#x653E;&#x7684;&#x6570;&#x636E;&#x7C7B;&#x578B;</li>
<li>&#x5206;&#x4E3A;<ul>
<li>&#x6570;&#x503C;&#x7C7B;&#x578B;</li>
<li>&#x5B57;&#x7B26;&#x4E32;&#x7C7B;&#x578B;</li>
<li>&#x65E5;&#x671F;&#x548C;&#x65F6;&#x95F4;&#x578B;&#x6570;&#x503C;&#x7C7B;&#x578B;</li>
<li>NULL&#x503C;</li>
</ul>
</li>
</ul>
<p><strong>&#x6570;&#x503C;&#x7C7B;&#x578B;</strong></p>
<table>
<thead>
<tr>
<th><strong>&#x7C7B;&#x578B;</strong></th>
<th><strong>&#x8BF4;&#x660E;</strong></th>
<th><strong>&#x53D6;&#x503C;&#x8303;&#x56F4;</strong></th>
<th><strong>&#x5B58;&#x50A8;&#x9700;&#x6C42;</strong></th>
</tr>
</thead>
<tbody>
<tr>
<td><code>tinyint</code></td>
<td><strong>&#x975E;&#x5E38;&#x5C0F;&#x7684;&#x6570;&#x636E;</strong></td>
<td><strong>&#x6709;&#x7B26;&#x503C;&#xFF1A;</strong> -2^7^ ~ 2^7^-1 <strong>&#x65E0;&#x7B26;&#x53F7;&#x503C;:</strong> 0 ~ 2^8^-1</td>
<td>1&#x5B57;&#x8282;</td>
</tr>
<tr>
<td><code>smallint</code></td>
<td><strong>&#x8F83;&#x5C0F;&#x7684;&#x6570;&#x636E;</strong></td>
<td><strong>&#x6709;&#x7B26;&#x503C;&#xFF1A;</strong> -2^15^ ~ 2^15^-1 <strong>&#x65E0;&#x7B26;&#x53F7;&#x503C;&#xFF1A;</strong> 0 ~ 2^16^-1</td>
<td>2&#x5B57;&#x8282;</td>
</tr>
<tr>
<td><code>mediumint</code></td>
<td><strong>&#x4E2D;&#x7B49;&#x5927;&#x5C0F;&#x7684;&#x6570;&#x636E;</strong></td>
<td><strong>&#x6709;&#x7B26;&#x503C;&#xFF1A;</strong> -2^23^ ~ 2^23^-1 <strong>&#x65E0;&#x7B26;&#x53F7;&#x503C;&#xFF1A;</strong> 0 ~ 2^24^-1</td>
<td>3&#x5B57;&#x8282;</td>
</tr>
<tr>
<td><code>int</code></td>
<td><strong>&#x6807;&#x51C6;&#x6574;&#x6570;</strong></td>
<td><strong>&#x6709;&#x7B26;&#x503C;&#xFF1A;</strong> -2^31 ~ 2^31-1 <strong>&#x65E0;&#x7B26;&#x53F7;&#x503C;&#xFF1A;</strong> 0 ~ 2^32^-1</td>
<td>4&#x5B57;&#x8282;</td>
</tr>
<tr>
<td><code>bigint</code></td>
<td><strong>&#x8F83;&#x5927;&#x7684;&#x6574;&#x6570;</strong></td>
<td><strong>&#x6709;&#x7B26;&#x503C;&#xFF1A;</strong> -2^63^ ~2^63^-1<strong>&#x65E0;&#x7B26;&#x53F7;&#x503C;&#xFF1A;</strong>0 ~2^64^-1</td>
<td>8&#x5B57;&#x8282;</td>
</tr>
<tr>
<td><code>float</code></td>
<td><strong>&#x5355;&#x7CBE;&#x5EA6;&#x6D6E;&#x70B9;&#x6570;</strong></td>
<td><strong>&#xB1;1.1754351e -38</strong></td>
<td>4&#x5B57;&#x8282;</td>
</tr>
<tr>
<td><code>double</code></td>
<td><strong>&#x53CC;&#x7CBE;&#x5EA6;&#x6D6E;&#x70B9;&#x6570;</strong></td>
<td><strong>&#xB1;2.2250738585072014e -308</strong></td>
<td>8&#x5B57;&#x8282;</td>
</tr>
<tr>
<td><code>decimal</code></td>
<td><strong>&#x5B57;&#x7B26;&#x4E32;&#x5F62;&#x5F0F;&#x7684;&#x6D6E;&#x70B9;&#x6570;</strong></td>
<td><strong>decimal</strong>(m, d)</td>
<td>m&#x4E2A;&#x5B57;&#x8282;</td>
</tr>
</tbody>
</table>
<p><strong>&#x5B57;&#x7B26;&#x4E32;&#x7C7B;&#x578B;</strong></p>
<table>
<thead>
<tr>
<th><strong>&#x7C7B;&#x578B;</strong></th>
<th><strong>&#x8BF4;&#x660E;</strong></th>
<th><strong>&#x6700;&#x5927;&#x957F;&#x5EA6;</strong></th>
</tr>
</thead>
<tbody>
<tr>
<td><code>char</code></td>
<td><strong>&#x56FA;&#x5B9A;&#x957F;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x68C0;&#x7D22;&#x5FEB;&#x4F46;&#x8D39;&#x7A7A;&#x95F4;&#xFF0C;</strong> <strong>0 &lt;= M &lt;=  255</strong></td>
<td><strong>M</strong>&#x5B57;&#x7B26;</td>
</tr>
<tr>
<td><code>varchar</code></td>
<td><strong>&#x53EF;&#x53D8;&#x5B57;&#x7B26;&#x4E32;</strong>0 &lt;= M &lt;= 65535</td>
<td><strong>&#x53D8;&#x957F;&#x5EA6;</strong></td>
</tr>
<tr>
<td><code>tinytext</code></td>
<td><strong>&#x5FAE;&#x578B;&#x6587;&#x672C;&#x4E32;</strong></td>
<td><strong>2^8^&#x2013;1&#x5B57;&#x8282;</strong></td>
</tr>
<tr>
<td><code>text</code></td>
<td><strong>&#x6587;&#x672C;&#x4E32;</strong></td>
<td><strong>2^16^&#x2013;1&#x5B57;&#x8282;</strong></td>
</tr>
</tbody>
</table>
<p><strong>&#x65E5;&#x671F;&#x548C;&#x65F6;&#x95F4;&#x578B;&#x6570;&#x503C;&#x7C7B;&#x578B;</strong></p>
<table>
<thead>
<tr>
<th><strong>&#x7C7B;&#x578B;</strong></th>
<th><strong>&#x8BF4;&#x660E;</strong></th>
<th><strong>&#x53D6;&#x503C;&#x8303;&#x56F4;</strong></th>
</tr>
</thead>
<tbody>
<tr>
<td><strong>DATE</strong></td>
<td><strong>YYYY-MM-DD</strong>&#xFF0C;&#x65E5;&#x671F;&#x683C;&#x5F0F;</td>
<td><strong>1000-01-01~ 9999-12-31</strong></td>
</tr>
<tr>
<td><strong>TIME</strong></td>
<td><strong><code>Hh:mm:ss</code></strong> <strong>&#xFF0C;&#x65F6;&#x95F4;&#x683C;&#x5F0F;</strong></td>
<td><strong>-838:59:59~838:59:59</strong></td>
</tr>
<tr>
<td><strong>DATETIME</strong></td>
<td><strong><code>YY-MM-DD hh:mm:ss</code></strong></td>
<td><strong>1000-01-01 00:00:00</strong> <strong>&#x81F3;</strong>9999-12-31 23:59:59</td>
</tr>
<tr>
<td><strong>TIMESTAMP</strong></td>
<td><strong><code>YYYYMMDDhhmmss</code></strong>&#x683C;&#x5F0F;&#x8868;&#x793A;&#x7684;&#x65F6;&#x95F4;&#x6233;</td>
<td><strong>197010101000000 ~2037</strong>&#x5E74;&#x7684;&#x67D0;&#x4E2A;&#x65F6;&#x523B;</td>
</tr>
<tr>
<td><strong>YEAR</strong></td>
<td><strong>YYYY</strong>&#x683C;&#x5F0F;&#x7684;&#x5E74;&#x4EFD;&#x503C;</td>
<td><strong>1901~2155</strong></td>
</tr>
</tbody>
</table>
<ul>
<li>NULL&#x503C;<ul>
<li>&#x7406;&#x89E3;&#x4E3A; &quot;&#x6CA1;&#x6709;&#x503C;&quot; &#x6216; &quot;&#x672A;&#x77E5;&#x503C;&quot;</li>
<li>&#x4E0D;&#x8981;&#x7528; NULL &#x8FDB;&#x884C;&#x7B97;&#x672F;&#x8FD0;&#x7B97;, &#x7ED3;&#x679C;&#x4EFB;&#x4E3A;null</li>
</ul>
</li>
<li>&#x9009;&#x62E9;&#x6570;&#x636E;&#x7ED3;&#x6784;<ul>
<li>&#x6574;&#x6570;&#x548C;&#x6D6E;&#x70B9;</li>
<li>&#x65E5;&#x671F;&#x7C7B;&#x578B;</li>
<li>char &#x548C; varchar</li>
</ul>
</li>
</ul>
<p><strong>&#x6570;&#x636E;&#x5B57;&#x6BB5;&#x5C5E;&#x6027;</strong></p>
<ul>
<li>unsigned<ul>
<li>&#x65E0;&#x7B26;&#x53F7;&#x7684;</li>
<li>&#x58F0;&#x660E;&#x8BE5;&#x6570;&#x636E;&#x5217;&#x4E0D;&#x5141;&#x8BB8;&#x4E3A;&#x8D1F;&#x6570;</li>
</ul>
</li>
<li><code>zerofill</code><ul>
<li>0 &#x586B;&#x5145;&#x7684;</li>
<li>&#x4E0D;&#x8DB3;&#x4F4D;&#x6570;&#x7684;&#x7528; 0 &#x6765;&#x586B;&#x5145;, &#x5982; <code>int(3)</code>,5 &#x5219; 005</li>
</ul>
</li>
<li>auto_increment<ul>
<li>&#x81EA;&#x52A8;&#x589E;&#x957F;&#x7684;, &#x6BCF;&#x6DFB;&#x52A0;&#x4E00;&#x884C;&#x6570;&#x636E;,&#x81EA;&#x52A8;&#x5728;&#x4E0A;&#x4E00;&#x4E2A;&#x6570;&#x503C;&#x4E0A;&#x52A0;1</li>
<li>&#x901A;&#x5E38;&#x7528;&#x4E8E;&#x8BBE;&#x7F6E;&#x4E3B;&#x952E;,&#x4E14;&#x4E3A;&#x6574;&#x6570;&#x7C7B;&#x578B;</li>
<li>&#x53EF;&#x5B9A;&#x4E49;&#x8D77;&#x59CB;&#x503C;&#x548C;&#x6B65;&#x957F;</li>
</ul>
</li>
<li>null &#x548C; not null<ul>
<li>&#x9ED8;&#x8BA4;&#x4E3A; null ,&#x5373;&#x6CA1;&#x6709;&#x63D2;&#x5165;&#x8BE5;&#x5217;&#x7684;&#x6570;&#x636E;</li>
<li>&#x5982;&#x679C;&#x8BBE;&#x7F6E;&#x4E3A; not null, &#x5219;&#x8BE5;&#x5217;&#x5FC5;&#x987B;&#x53C8;&#x503C;</li>
</ul>
</li>
<li>default<ul>
<li>&#x9ED8;&#x8BA4;&#x7684;</li>
<li>&#x7528;&#x4E8E;&#x8BBE;&#x7F6E;&#x9ED8;&#x8BA4;&#x503C;<ul>
<li>&#x4F8B;&#x5982;, &#x6027;&#x522B;&#x5B57;&#x6BB5;,&#x9ED8;&#x8BA4;&#x4E3A; &quot;&#x7537;&quot; , &#x5426;&#x5219;&#x4E3A; &quot;&#x5973;&quot;; &#x82E5;&#x65E0; &#x6307;&#x5B9A;&#x8BE5;&#x5217;&#x7684;&#x503C;,&#x5219;&#x9ED8;&#x8BA4;&#x4E3A; &quot;&#x7537;&quot; &#x7684;&#x503C;</li>
</ul>
</li>
</ul>
</li>
</ul>
<p><strong>&#x6570;&#x636E;&#x5B57;&#x6BB5;&#x6CE8;&#x91CA;</strong>
&#x8868;&#x5217;&#x7C7B;&#x578B;&#x6CE8;&#x91CA;</p>
<pre><code class="lang-mysql">CREATE   TABLE [ IF NOT EXISTS ]    `test`   (
      `id`   int (11)  UNSIGNED  COMMENT   &#x2018;&#x7F16;&#x7801;&#x53F7;&#x2019;
)COMMENT=&#x2018;&#x6D4B;&#x8BD5;&#x8868;&#x2019;;
</code></pre>
<p><strong>MySql &#x6CE8;&#x91CA;</strong></p>
<ol>
<li><code>#</code> &#x5355;&#x884C;&#x6CE8;&#x91CA;</li>
<li><code>/* ... */</code> &#x591A;&#x884C;&#x6CE8;&#x91CA;</li>
</ol>
<pre><code class="lang-mysql">create table &#x8868;&#x540D;(
    # &#x6CE8;&#x91CA;&#x90E8;&#x5206;
)
&#x6216;&#x8005;
create table &#x8868;&#x540D;(
    /*

    */
)
</code></pre>
<p><strong>&#x6570;&#x636E;&#x8868;&#x7684;&#x7C7B;&#x578B;</strong></p>
<ul>
<li><strong><code>MySql</code>&#x7684;&#x6570;&#x636E;&#x8868;&#x7684;&#x7C7B;&#x578B;</strong></li>
</ul>
<p>&#x200B;        <code>MyISAM</code>, <code>InnoDB</code>, HEAP, BOB, CSV</p>
<ul>
<li>&#x5E38;&#x89C1;&#x7684; <code>MyISAM</code> &#x4E0E; <code>InnoDB</code> &#x7C7B;&#x578B;</li>
</ul>
<table>
<thead>
<tr>
<th style="text-align:left"><strong>&#x540D;&#x79F0;`</strong>`</th>
<th style="text-align:left"><code>**MyISAM**</code></th>
<th style="text-align:left"><strong>InnoDB</strong></th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:left"><strong>&#x4E8B;&#x52A1;&#x5904;&#x7406;</strong></td>
<td style="text-align:left"><strong>&#x4E0D;&#x652F;&#x6301;</strong></td>
<td style="text-align:left"><strong>&#x652F;&#x6301;</strong></td>
</tr>
<tr>
<td style="text-align:left"><strong>&#x6570;&#x636E;&#x884C;&#x9501;&#x5B9A;</strong></td>
<td style="text-align:left"><strong>&#x4E0D;&#x652F;&#x6301;</strong></td>
<td style="text-align:left"><strong>&#x652F;&#x6301;</strong></td>
</tr>
<tr>
<td style="text-align:left"><strong>&#x5916;&#x952E;&#x7EA6;&#x675F;</strong></td>
<td style="text-align:left"><strong>&#x4E0D;&#x652F;&#x6301;</strong></td>
<td style="text-align:left"><strong>&#x652F;&#x6301;</strong></td>
</tr>
<tr>
<td style="text-align:left"><strong>&#x5168;&#x6587;&#x7D22;&#x5F15;</strong></td>
<td style="text-align:left"><strong>&#x652F;&#x6301;</strong></td>
<td style="text-align:left"><strong>&#x4E0D;&#x652F;&#x6301;</strong></td>
</tr>
<tr>
<td style="text-align:left"><strong>&#x8868;&#x7A7A;&#x95F4;&#x5927;&#x5C0F;</strong></td>
<td style="text-align:left"><strong>&#x8F83;&#x5C0F;</strong></td>
<td style="text-align:left"><strong>&#x8F83;&#x5927;,&#x7EA6;2&#x500D;</strong></td>
</tr>
</tbody>
</table>
<blockquote>
<p>&#x4F7F;&#x7528; <code>MyISAM</code>: &#x8282;&#x7701;&#x7A7A;&#x95F4;&#x53CA;&#x54CD;&#x5E94;&#x901F;&#x5EA6;</p>
<p>&#x4F7F;&#x7528; <code>InnoDB</code>: &#x5B89;&#x5168;&#x6027;, &#x4E8B;&#x52A1;&#x5904;&#x7406;&#x53CA;&#x591A;&#x7528;&#x6237;&#x64CD;&#x4F5C;&#x6570;&#x636E;&#x8868;</p>
</blockquote>
<p><strong>&#x8868;&#x7C7B;&#x578B;&#x8BBE;&#x7F6E;</strong></p>
<pre><code class="lang-mysql">create table [if not exists] `&#x8868;&#x540D;` (
    `&#x5B57;&#x6BB5;&#x540D;1` &#x5217;&#x7C7B;&#x578B; [&#x5C5E;&#x6027;] [&#x7D22;&#x5F15;] [&#x6CE8;&#x91CA;],
    `&#x5B57;&#x6BB5;&#x540D;2` &#x5217;&#x7C7B;&#x578B; [&#x5C5E;&#x6027;] [&#x7D22;&#x5F15;] [&#x6CE8;&#x91CA;],
    ... ...
    `&#x5B57;&#x6BB5;&#x540D;n` &#x5217;&#x7C7B;&#x578B; [&#x5C5E;&#x6027;] [&#x7D22;&#x5F15;] [&#x6CE8;&#x91CA;]
) [&#x8868;&#x7C7B;&#x578B;] [&#x8868;&#x5B57;&#x7B26;&#x96C6;] [&#x6CE8;&#x91CA;];
</code></pre>
<ul>
<li><p>&#x53EF;&#x4E3A;&#x6570;&#x636E;&#x5E93;,&#x6570;&#x636E;&#x8868;,&#x6570;&#x636E;&#x5217;&#x8BBE;&#x5B9A;&#x4E0D;&#x540C;&#x7684;&#x5B57;&#x7B26;&#x96C6;</p>
</li>
<li><p>&#x8BBE;&#x5B9A;&#x65B9;&#x6CD5;</p>
<ul>
<li>&#x521B;&#x5EFA;&#x65F6;&#x901A;&#x8FC7;&#x547D;&#x4EE4;&#x6765;&#x8BBE;&#x7F6E;, &#x5982;</li>
</ul>
<pre><code class="lang-mysql">create table &#x8868;&#x540D; (

) charset = utf-8;
</code></pre>
<ul>
<li><p>&#x5982;&#x65E0;&#x8BBE;&#x5B9A;,&#x5219;&#x6839;&#x636E;MySql&#x6570;&#x636E;&#x5E93;&#x914D;&#x7F6E;&#x6587;&#x4EF6; my.ini</p>
<ul>
<li>(Windows&#x7CFB;&#x7EDF;) &#x4E2D;&#x7684;&#x53C2;&#x6570;&#x8BBE;&#x5B9A;</li>
</ul>
<p>&#x5982;: character-set-sever = utf-8</p>
</li>
</ul>
</li>
</ul>
<p><strong>&#x521B;&#x5EFA;&#x8868;&#x7D22;&#x5F15;</strong></p>
<ul>
<li>&#x7D22;&#x5F15;</li>
</ul>
<pre><code class="lang-mysql">create table [if not exists] `&#x8868;&#x540D;` (
    `&#x5B57;&#x6BB5;&#x540D;1` &#x5217;&#x7C7B;&#x578B; [&#x5C5E;&#x6027;] [&#x7D22;&#x5F15;] [&#x6CE8;&#x91CA;],
    `&#x5B57;&#x6BB5;&#x540D;2` &#x5217;&#x7C7B;&#x578B; [&#x5C5E;&#x6027;] [&#x7D22;&#x5F15;] [&#x6CE8;&#x91CA;],
    ... ...
    `&#x5B57;&#x6BB5;&#x540D;n` &#x5217;&#x7C7B;&#x578B; [&#x5C5E;&#x6027;] [&#x7D22;&#x5F15;] [&#x6CE8;&#x91CA;]
) [&#x8868;&#x7C7B;&#x578B;] [&#x8868;&#x5B57;&#x7B26;&#x96C6;] [&#x6CE8;&#x91CA;];
</code></pre>
<p><strong>&#x4FEE;&#x6539;&#x6570;&#x636E;&#x8868;</strong></p>
<pre><code class="lang-mysql"># &#x4FEE;&#x6539;&#x8868;&#x540D;
alter table &#x65E7;&#x8868;&#x540D; rename as &#x65B0;&#x8868;&#x540D;

# &#x6DFB;&#x52A0;&#x5B57;&#x6BB5;
alter table &#x8868;&#x540D; add &#x5B57;&#x6BB5;&#x540D; &#x5217;&#x7C7B;&#x578B; [&#x5C5E;&#x6027;]

# &#x4FEE;&#x6539;&#x5B57;&#x6BB5;
alter table &#x8868;&#x540D; modify &#x5B57;&#x6BB5;&#x540D; &#x5217;&#x5C5E;&#x6027; [&#x5C5E;&#x6027;]
alter table &#x8868;&#x540D; change &#x65E7;&#x5B57;&#x6BB5;&#x540D; &#x65B0;&#x5B57;&#x6BB5;&#x540D; &#x5217;&#x7C7B;&#x578B; [&#x5C5E;&#x6027;]

# &#x5220;&#x9664;&#x5B57;&#x6BB5;
alter table &#x8868;&#x540D; drop &#x5B57;&#x6BB5;&#x540D;
</code></pre>
<p><strong>&#x5220;&#x9664;&#x8868;</strong></p>
<pre><code class="lang-mysql">drop table [if exists] &#x8868;&#x540D;
</code></pre>
<ul>
<li>if exists &#x4E3A;&#x53EF;&#x9009;,&#x5224;&#x65AD;&#x662F;&#x5426;&#x5B58;&#x5728;&#x8BE5;&#x6570;&#x636E;&#x8868;</li>
<li>&#x5982;&#x5220;&#x9664;&#x4E0D;&#x5B58;&#x5728;&#x7684;&#x6570;&#x636E;&#x8868;&#x4F1A;&#x629B;&#x51FA;&#x9519;&#x8BEF;</li>
</ul>
<pre><code class="lang-mysql">#&#x521B;&#x5EFA;&#x6570;&#x636E;&#x5E93;Java2217
CREATE DATABASE IF NOT EXISTS Java2217

-- &#x4F7F;&#x7528;&#x6570;&#x636E;&#x5E93;Java2217
USE Java2217

#&#x4FEE;&#x6539;&#x8868;&#x540D;
ALTER TABLE `tb6` RENAME AS `table6`
#&#x5411;&#x8868;&#x4E2D;&#x6DFB;&#x52A0;&#x5B57;&#x6BB5;
ALTER TABLE `table6` ADD `stuGender` VARCHAR(3) 


#&#x5411;&#x8868;&#x4E2D;&#x63D2;&#x5165;&#x6570;&#x636E;
INSERT INTO table6 (stuId,stuName,stuGender) VALUES(1001,&apos;&#x5F20;&#x4E09;&apos;,&apos;&#x7537;&apos;)
INSERT INTO table6  VALUES(1002,&apos;&#x674E;&#x56DB;&apos;,&apos;&#x7537;&apos;)

#&#x6279;&#x91CF;&#x5411;&#x8868;&#x4E2D;&#x63D2;&#x5165;&#x6570;&#x636E;
INSERT INTO table6  VALUES
(1003,&apos;&#x674E;&#x56DB;2&apos;,&apos;&#x7537;&apos;),
(1004,&apos;&#x674E;&#x56DB;3&apos;,&apos;&#x7537;&apos;),
(1005,&apos;&#x674E;&#x56DB;4&apos;,&apos;&#x7537;&apos;),
(1006,&apos;&#x674E;&#x56DB;5&apos;,&apos;&#x7537;&apos;);


#&#x4FEE;&#x6539;&#x6570;&#x636E;
UPDATE table6 SET stuName=&apos;&#x738B;&#x4E94;&apos;
UPDATE table6 SET stuName = &apos;&#x5F20;&#x4E09;&apos; WHERE stuId=1002
UPDATE table6 SET stuName = &apos;&#x7FE0;&#x82B1;&apos;,stuGender = &apos;&#x5973;&apos; WHERE stuId = 1003
</code></pre>

                                
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